Polar vortex strikes the US with dangerous sub-zero temperatures

A dangerous polar vortex moving through the Dakotas into Chicago, Illinois and on to New England is blasting the US with super-cold arctic air and sub-zero temperatures. “This is dangerous, deadly cold,” said Richard Bann, meteorologist with the NWS’s Weather Prediction Center in College Park Maryland. Blizzard conditions are predicted across parts of the western Ohio Valley and snow is expected Tuesday through Wednesday from the Great Lakes area into New England, the weather service said.